Uniaxial strain method for soft crystals: Application to the control of the electronic properties of organic conductors
Uniaxial strain method for soft crystals: Application to the control of the electronic properties of organic conductors
复制标题
软晶体的单轴应变法：在有机导体电子性能控制中的应用
DOI：
10.1063/1.1150180
复制
发表时间：
2000
影响因子：
1.6
通讯作者：
S. Kagoshima
中科院分区：
文献类型：
--
作者：
M. Maesato;Y. Kaga;R. Kondo;S. Kagoshima
我们发展了一种单轴应变方法，可以在不涉及泊松效应的情况下沿任何方向压缩晶体样品。单轴应变是这样实现的：将镶嵌在环氧树脂中的样品或在冷冻石油中的样品的复合材料插入圆柱体中，其硬度比样品复合材料的硬度大得多，然后向施加在样品复合材料上的活塞施加外力。我们用嵌入在环氧油或冻结油中的应变计验证了这样产生的应变具有单轴性质。α-(BEDT-TTf)2KHg(SCN)4和α-(BEDT-TTf)2I3两种有机导体在单轴应变下的电阻测量显示了在静水压下从未发现的新的电学性质。发现它们的性质在很大程度上由单轴应变的方向决定，即使是沿具有二维性质的导电平面的方向施加时也是如此。
We developed the uniaxial strain method to compress a crystalline sample along any direction without involving Poisson’s effect. The uniaxial strain is realized by inserting a composite of either the sample embedded in epoxy or the sample in frozen oil into a cylinder much harder than the sample composite followed by the application of external forces to a piston put on the sample composite. We verified, by using a strain gauge embedded in the epoxy or the frozen oil, that the strain thus created has the uniaxial nature. Resistance measurements on two kinds of organic conductors, α-(BEDT–TTF)2KHg(SCN)4 and α-(BEDT–TTF)2I3 under the uniaxial strain showed novel electric properties that have never been found under hydrostatic pressures. Their properties were found to be largely dominated by the direction of the uniaxial strain even when it is applied along directions in the conducting plane having a two-dimensional nature.